Omnigrid and Marti Michell make template sets for cutting a DWR. The speed piecing method would be John Flynn. Elenor Burns made a version with fusible interfacing as well as Quiltsmart. Oops almost forgot the Ardco template set. Once you pick a method there are lots of resources since this is a very traditional pattern. Just watch your bias if doing this traditionally. It can be a friend or foe.